1 / 12

Nickel

Nickel. Leung Hau Lam(32) Lau Ho Yin(30) Wong Pui San(43) Wang Kwun Sing(41) Class: 5D. Introduction of Nickel. chemical element ( Ni ) atomic number 28 silvery-white lustrous transition metal hard and ductile. Physical pr o perties. U SAGES.

aderes
Download Presentation

Nickel

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nickel Leung Hau Lam(32) Lau Ho Yin(30) Wong Pui San(43) Wang Kwun Sing(41) Class: 5D

  2. Introduction of Nickel • chemical element (Ni) • atomic number 28 • silvery-white lustrous transition metal • hard and ductile

  3. Physical properties

  4. USAGES • corrosion-resistant -use for plating metals • nickel alloy • catalyst for hydrogenation • Enzymes of some microorganisms and plants contain nickel as an active center

  5. USAGES • electroplatingand themanufacture ofalkalinebatteries • Nickel metal is used in making alloys (E.g. a "horseshoe magnet" made of alnico nickel alloy The composition of alnico alloys is typically 8–12% Al, 15–26% Ni, 5–24% Co, up to 6% Cu, up to 1% Ti. )

  6. APPLICATIONS • Nickel is used to make Nickel aluminide • made up ofnickelcombined with several other metals including aluminium,chromium, molybdenum,zirconiumandboron • Adding boron increases theductilityof the alloy and hardness • This alloy is extremely strong for its weight, five times stronger than stainless steel. Unlike most alloys, IC-221M increases in strength from room temperature up to 800°C.

  7. APPLICATIONS • Nickel aluminide - has very high thermal conductivity combined with high strength at high temperature -high strength and low density, used to coat blades ingas turbinesandjet engines

  8. APPLICATIONS • Nickel is used in hydrogenation • Hydrogenation is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst. • Hydrogenation typically constitutes the addition of pairs of hydrogen atoms to a molecule, generally an alkene. Catalysts are required for the reaction to be usable

  9. APPLICATIONS • substitute for decorative silver • making nickel-cadmium battery • The nickel–cadmium battery (commonly abbreviated NiCad or NiCad) is a type of rechargeable battery using nickel oxide hydroxide and metallic cadmium as electrodes.

  10. APPLICATIONS • A fully charged NiCad cell contains: • Anickel (IV) oxide-hydroxidepositiveelectrode plate. • Acadmiumnegative electrode plate. • Aseparator. • Analkalineelectrolyte(potassium hydroxide).

  11. Equations • Thechemical reactionsin a NiCad battery during discharge are: • At the cadmium electrode: • At the nickel electrode: • The overall equation is

  12. ~END~

More Related